EXCLUSIVE: Martin Sheen Responds to Marcia Clark's Criticism of 'OJ Is Innocent' Project: She Hasn't Seen It Y

The 75-year-old actor -- who is executive producing and narrating the project -- responded to criticisms by Marcia Clark, lead prosecutor in the infamous 1995 O.J. Simpson murder trial, who called the docuseries "offensive," and "nonsense."

"She hasn’t seen the project yet, so I would reserve judgment," Sheen told ET’s Katie Krause at the WE Day youth empowerment event in Los Angeles on Thursday. "We’re just asking a few questions about the original trial, and there’s a lot of information and a lot of evidence that has never been uncovered before, so, we’re just going to present some questions pertaining to the evidence and see where it lies – that’s all."

"I’m not challenging her and she ought not make a judgment without seeing the series," he added.

Slamming the Investigation Discovery docuseries on Tuesday's Today show, Clark claimed that it will try to implicate the acquitted former NFL player's 45-year-old son, Jason Simpson, in the 1994 murders of Nicole Brown Simpson and Ronald Goldman.

"I find it offensive," she said. "Because it is nonsense, because there's no real logic, there's no evidence, there's nothing to back it up. Nothing. And they're aiming at Jason Simpson. And that is, to me, the most hideous thing you could possibly do."

Meanwhile, during the red carpet, Sheen also discussed the importance of young people getting involved.

"This is a celebration of all of these extraordinary young people who have dared to step out and challenge their peers to serve others," Sheen said of the event. "They encourage each other to go out and continue to change the changing world... They are the future."